1. thin, tenuous, or rarefied, as a fluid or an odor.
2. fine or delicate in meaning or intent; difficult to perceive or understand: subtle irony.
3. delicate or faint and mysterious: a subtle smile.
4. requiring mental acuteness, penetration, or discernment: a subtle philosophy.
5. characterized by mental acuteness or penetration: a subtle understanding.
6. cunning, wily, or crafty: a subtle liar.
7. insidious in operation: subtle poison.
"differences can be subtle as things."
"problems can be subtle in testings."
"people can be subtle for people."
"people can be subtle at things."
"people can be subtle as trucks."
This list can help you learn new vocabulary more quickly and be able explore other words more easily.